In the bottom 2 holes are drilled to access the screw i suppose,should'nt these two holes have internal threads(1/4 x 20 and 3/8 x 16)for using it with tripod or boompole?

Because in the package is mentioned that i can attach the shockmount to the tripod or boompole,but i don't see how....

I just grabbed one from our stock and opened it up to check for you.
Ours have 3 holes. Here you can see a boom pole with a 3/8" stud snuggly inserted into a RODE SM5 shockmount.

Thank you very much for checking and for posting the picture.

I'll check with the shop where i bought it and try to change it.